For some modes of weak signal communication, it can be desireable to have a very fast AGC (e.g. meteor bursts with a sharp rise and a long weak "tail"). The standard fast AGC has a time constant of about 2 secs (!), which also means that a noise pulse can mute you for quite some time.
Note: Never use the noise blanker when receiving high speed CW (Meteor Scatter). The noise blanker mistakes the high speed keying for noise pulses, and will seriously corrupt the signal.
The solution is to move the "AGC fast" capacitor (C19) to replace the "AGC slow" capacitor (C20). You will loose the "AGC slow" option, but I find "AGC fast" adequate for most signals.
Another solution is to switch out the "AGC fast" capacitor (C19) seperately, but then you will get the problem of finding an appropiate front plate switch. I already tried to use the DATA button, but it cannot be activated in CW.
Note: a strong signal will be seriously distorted in AGC OFF mode.
- remove C20
- move C19 to the replace C20